Luminescence of minerals

A luminescent mineral is a sohd, which converts certain types of energy into electromagnetic radiation over and above thermal radiation. The electromagnetic radiation emitted by a luminescent mineral is usually in the visible range, but can also occur in the ultraviolet (UV) or infrared (IR) range. It is possible to excite the luminescence of minerals by UV and visible radiation (photoluminescence), by a beam of energetic electrons (cathodoluminescence), by X-rays (X-ray excited luminescence) and so on. A special case is so-called thermoluminescence, which is stimulation by the heating of luminescence, prehminary excited in a different way. [Pg.3]

In single beam two-photon spectroscopy, an intense laser beam having a frequency hv = l/2(fi2 -E )is passed through the crystal, and the attenuation of the beam is measured. To measure attenuation directly is extremely difficult and it is better to measure the proportional quantity, while the fluorescence maybe the most useful. Two-photon spectroscopy has not been used so far in the luminescence of minerals field, but many relevant centers have been studied in artificial compounds, such as Cr ", Mn, Cu, Ni, Eu (McClure 1990). [Pg.19]

The lasers are used in the luminescence of minerals for the following reasons ... [Pg.35]

Einstein s laws of absorption and emission describe the operation of lasers. The luminescence of minerals, considered in this book, is a spontaneous emission where the luminescence is independent of incident radiation. In a stimulated emission the relaxation is accomplished by interaction with a photon of the same energy as the relaxation energy. Thus the quantum state of the excited species and the incident photon are intimately coupled. As a result the incident and the emitted photons will have the same phase and propagation direction. The emitted light of stimulated emission is therefore coherent as opposed to the... [Pg.35]

Short Description of the Lasers Used for Luminescence of Minerals Excitation... [Pg.36]

Gaft M (1989) Luminescence of minerals imder laser excitation. Ministry of Geology, Moscow (in Russian)... [Pg.335]

The Introduction chapter contains the basic definitions of the main scientific terms, such as 5pectro5copy, luminescence spectroscopy, luminescent mineral, luminescent center, luminescence lifetime, luminescence spectrum and excitation spectrum. The state of the art in the steady-state luminescence of minerals field is presented. The main advantages of the laser-induced time resolved technique in comparison with the steady-state one are shortly described. [Pg.361]

Photoluminescence, Candoluminescence, and Radical Recombination Luminescence of Minerals... [Pg.121]

Suitch PR, LaCout JL, Hewat A, Young RA (1985) The stractural location and role of Mn partially substituted for Ca in fluorapatite. Acta Crystallogr 641 173-179 Tachihante M, Zambon D, Cousseins JC (1996) optical study of the Tb to Eu energy transfer in calcium fluorapatite. Eur J Solid State Inorg Chem 33 713-725 Taraschan A. (1978) Luminescence of Minerals. Naukova Dumka, Kiev (in Russian)... [Pg.742]

Taraschan A, Waychunas G (1995) Luminescence of minerals. In Advanced Mineralogy 2. Methods and Instiumentation. Marfunin A (ed) Springer, Berlin, p 124-135 Temane R, Trabelsi-Ayedi M, Kbir-Ariguib N, Piriou B (1999) Luminescent properties of Eu in calcium hydroxyapatite. JLumin 81 153-236... [Pg.742]

These results were used also in geosciences, remote sensing, exploration, natural dosimetry, mineral processing etc. Starting from approximately 20 years ago, UV lasers have been used as luminescence of minerals excitation source. By such a way, not only luminescence spectra, but decay times also have been determined. The main motivation was to use laser-induced luminescence for remote sensing of mineral deposits (Kasdan et al. 1981 Seigel and Robbins 1985). Systematical... [Pg.5]

Gaft M, Reisfeld R, Panczer G, Oiampagnon B (1997c) Reabsorption lines of molecular oxygen and water in natural apatite. Opt Mater 8(1-2) 143-149 Gaft M, Reisfeld R, Panczer G et al (1998) Laser-induced time-resolved luminescence of minerals. Spectrochim Acta A 54 2163-2175... [Pg.214]

Gaft M, Reisfeld R, Panczer G et al (2001) The nature of orange luminescence of mineral barite. Opt Mater 16(l-2) 279-290... [Pg.214]

White W (1990) Photoluminescence, candoluminescence, and radical recombination luminescence of minerals. In Coyne L, McKeever W, Blake D (eds) Spectroscopic characterization of minerals and their surfaces. American Chemical Society, Washington, DC, pp 118-134 White W, Masako M, Linnehan et al (1986) Absorption and luminescence of Fe in single-crystal orthoclase. Am Miner 71 1415-1419... [Pg.220]

Lenz C, Talla D, Ruschei K et ai (2013) Factors affecting the Nd (REE ) luminescence of minerals. Miner Petrol 107 415 28... [Pg.416]

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